#23846 - 11/04/08 07:12 PM
ZZP 3" catted DP = Service engine soon light... Why??
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Registered: 08/30/08
Posts: 148
Loc: Holyoke, MA
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I installed a new ZZP 3" catted dp a couple weeks ago and all has been fine until a few days ago when the service engine soon light came on. I reset the computer, because I never did upon installing the new dp and all was fine for a few more days, when all of the sudden the light came back on today. I went to autozone to have them scan my codes, and two codes, both depicting catalytic converter inefficient malfunction blah blah came up. Is this a regular occurance with a hi-flow cat on the L67 engine, or could there be a defect with my new cat? The car was fine for two weeks with the new dp on, and now it is pulling these codes. 
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01 GTP
Headers, modified 1.9's, 3.4 mps, Overkill pcm, and a bunch of other little goodies.
Near future: Gen V, N*, XP, and all supporting mods...
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#23847 - 11/04/08 07:14 PM
Re: ZZP 3" catted DP = Service engine soon light... Why??
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Registered: 04/18/05
Posts: 8901
Loc: Bradenton, FL
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Yep. Hi-flow cats can do that.
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Corey Smith 
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#23848 - 11/04/08 07:19 PM
Re: ZZP 3" catted DP = Service engine soon light... Why??
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Registered: 10/22/08
Posts: 2083
Loc: Cranston, RI
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Get an O2 Emulator from ZZP 
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 04 GTO M6 | HE SS Clutch | Kooks LT's | SLP LM2 | K&N Soon: APS TT kit SOLD \/ 01 GT | STr5 cam | PT-67 | 18-22psi
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#23850 - 11/04/08 07:32 PM
Re: ZZP 3" catted DP = Service engine soon light... Why??
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Registered: 01/08/07
Posts: 6026
Loc: Des Moines ,Iowa
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same that should fix the problem
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#23851 - 11/04/08 09:15 PM
Re: ZZP 3" catted DP = Service engine soon light... Why??
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Registered: 09/27/07
Posts: 1575
Loc: Where Dorthy,Toto & Wicked Wit...
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Read the portion under "IMPORTANT information concerning High Flow Catalytic converters" https://www.zzperformance.com/grand_prix/products1.php?id=551&catid=110
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03 GT, STB, GM HD sway bars, 35% tint, GE893(37watt)fogs, Flowtech Terminators, 180 T-stat, ZZP DP & PCM, Ceramic PLOG & Crossover, 18" glasspack, 2007 17" Mustang Bullits 235/55/17 Pirelli PZero Nero, 12" R1 D\S rotors, gutted air box, GTP radiator
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#23852 - 11/04/08 10:02 PM
Re: ZZP 3" catted DP = Service engine soon light... Why??
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Registered: 08/30/08
Posts: 148
Loc: Holyoke, MA
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Thanks guys. I feel better about it now haha. I'm getting an overkill pcm soon enough, so I will just have the code removed. I will not damage anything from driving with the code stored in the pcm, correct? I don't mind seeing the SES light for the time being... My car still drives the same and I don't have emissions until April
_________________________
01 GTP
Headers, modified 1.9's, 3.4 mps, Overkill pcm, and a bunch of other little goodies.
Near future: Gen V, N*, XP, and all supporting mods...
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Top
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#23853 - 11/04/08 10:13 PM
Re: ZZP 3" catted DP = Service engine soon light... Why??
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Member
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Registered: 04/18/05
Posts: 8901
Loc: Bradenton, FL
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nope, no side effects except for the light, you'll be fine
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Corey Smith
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#23854 - 11/05/08 09:15 AM
Re: ZZP 3" catted DP = Service engine soon light... Why??
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Registered: 04/08/08
Posts: 2647
Loc: Iowa City, IA
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Did you have the rear o2 sensor put back on? 01+ grand prixes have been known to go into "retarded mode" without the rear o2, due to entering a cat test mode which floods the engine with fuel. If you haven't noticed a difference in your car, you're probably fine, but something to keep in mind. See this thread: http://www.grandprixforums.net/f65/removing-rear-o2-sensor-01-newer-7092.html
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'99 GTP, L36 bottom, XP cam, Headers, 3.29 gears, FWI, Powrtuner
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#23856 - 11/05/08 07:35 PM
Re: ZZP 3" catted DP = Service engine soon light... Why??
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Registered: 08/30/08
Posts: 148
Loc: Holyoke, MA
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Originally posted by Zalfrin: Did you have the rear o2 sensor put back on? 01+ grand prixes have been known to go into "retarded mode" without the rear o2, due to entering a cat test mode which floods the engine with fuel. If you haven't noticed a difference in your car, you're probably fine, but something to keep in mind.
See this thread: http://www.grandprixforums.net/f65/removing-rear-o2-sensor-01-newer-7092.html Yes, the rear 02 is still installed.
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01 GTP
Headers, modified 1.9's, 3.4 mps, Overkill pcm, and a bunch of other little goodies.
Near future: Gen V, N*, XP, and all supporting mods...
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